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lightning-sunbird  0.9+nobinonly
DeleteTextTxn.h
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00001 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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00015  * The Original Code is mozilla.org code.
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00024  * Alternatively, the contents of this file may be used under the terms of
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00037 
00038 #ifndef DeleteTextTxn_h__
00039 #define DeleteTextTxn_h__
00040 
00041 #include "EditTxn.h"
00042 #include "nsIEditor.h"
00043 #include "nsIDOMCharacterData.h"
00044 #include "nsCOMPtr.h"
00045 
00046 #define DELETE_TEXT_TXN_CID \
00047 {/* 4d3a2720-ac49-11d2-86d8-000064657374 */ \
00048 0x4d3a2720, 0xac49, 0x11d2, \
00049 {0x86, 0xd8, 0x0, 0x0, 0x64, 0x65, 0x73, 0x74} }
00050 
00051 class nsRangeUpdater;
00052 
00056 class DeleteTextTxn : public EditTxn
00057 {
00058 public:
00059 
00060   static const nsIID& GetCID() { static const nsIID iid = DELETE_TEXT_TXN_CID; return iid; }
00061 
00068   NS_IMETHOD Init(nsIEditor *aEditor,
00069                   nsIDOMCharacterData *aElement,
00070                   PRUint32 aOffset,
00071                   PRUint32 aNumCharsToDelete,
00072                   nsRangeUpdater *aRangeUpdater);
00073 
00074 private:
00075   DeleteTextTxn();
00076 
00077 public:
00078        virtual ~DeleteTextTxn();
00079 
00080   NS_IMETHOD DoTransaction(void);
00081 
00082   NS_IMETHOD UndoTransaction(void);
00083 
00084   NS_IMETHOD Merge(nsITransaction *aTransaction, PRBool *aDidMerge);
00085 
00086   NS_IMETHOD GetTxnDescription(nsAString& aTxnDescription);
00087 
00088 protected:
00089 
00091   nsIEditor* mEditor;
00092 
00094   nsCOMPtr<nsIDOMCharacterData> mElement;
00095   
00097   PRUint32 mOffset;
00098 
00100   PRUint32 mNumCharsToDelete;
00101 
00103   nsString mDeletedText;
00104 
00106   nsRangeUpdater *mRangeUpdater;
00107   
00108   friend class TransactionFactory;
00109 
00110 };
00111 
00112 #endif